A. What is a positive occult blood test A positive occult blood test refers to the child’s stool from the appearance of no blood color, and from the microscopic examination did not find red blood cells, but through chemical or immunological methods can be detected in the stool of a trace of bleeding laboratory results Second, the main causes of the child’s positive occult blood in the stool The main causes of the child’s positive occult blood in the stool are the following. 1, false positive: If the child does not have any discomfort symptoms, growth and development is also normal, but only in the examination of the stool found positive occult blood, this should be highly suspected of false positive. For example, within the first three days of the stool test, the child had eaten duck blood, chicken blood, beef, pork liver, iron supplementation drugs and green leafy vegetables and other diets. This is because these foods or drugs contain iron away from all contain iron ions 2, intestinal infections: whether the child is a viral infection such as rotavirus, or bacterial infections such as E. coli, dysentery bacillus, can cause the child to appear positive for occult blood in the stool. This is mainly caused by the child does not pay attention to hand hygiene or eat less clean food. 3, milk protein allergy: milk protein allergic children after eating milk powder, due to allergies to protein, which will also cause stool occult blood positive. The child will often be accompanied by facial eczema or even allergic rhinitis. 4, peptic ulcers: children with either upper or lower peptic ulcers can cause positive fecal occult blood. Especially if the child has H. pylori infection. 5, intestinal polyps: some children have a family history of intestinal polyps and usually like to eat too much meat, which can also cause stool occult blood positive due to intestinal polyps, 6, inflammatory bowel disease: children suffering from ulcerative colitis or Crohn’s disease, will also cause stool occult blood positive. This will cause the child repeatedly stool occult blood positive and accompanied by mucus stool. 7, digestive tract tumors: children with digestive tract tumors will also appear positive fecal occult blood. The probability of children suffering from intestinal tumors, especially malignant tumors, is not too high, especially if there is no family history of tumors. As you can see above, there are many reasons why a child may have positive fecal occult blood, and the severity varies greatly, so it is important to go to the hospital in time to find a professional doctor for identification.